I have 4 or 5 new construction residential homes going
up within a half mile of me and I have an almost unlimited
amount of 2x4 and 2x6 cutoffs available to me ( in the dumpsters)
and I have already brought home a pickup truck full for firewood
and kindling. It occurs to me that I could glue these boards
together and either get a 3.5 or 5.5 inch thick table top
for only the cost of the glue. But I expect it would take
a ton of glue. My guess is probably two gallons to be applied
with paint brush and I wonder if the project is worth the
cost of the glue? Any ideas on the cost of that much glue
and where to buy in such larger quantities ?

I know epoxy and wood glue would be the most expensive,
and was thinking that the 2 part polyester used with fiberglass
fabric in boat-hulls comes in large containers and more
affordable. The question is would it be strong enough if
used as glue ?

What else would be a good use of all those lumber scraps
glued up to make thick planks ?